<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
{% block head %}
    “此处是要展示的页头信息”
{% endblock %}
<br>
{% block content %}
    "此处是要替换的内容"
{% endblock %}
<br>
{% block foot %}
    “此处是要展示的页尾信息”
{% endblock %}
</body>
</html>